Can't you just put the vertical text outside of the GridView?
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Filip SkakunJan 20 '13 at 22:52

If i do that the text will be after the displayed items.
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RomainJan 20 '13 at 23:15

That depends where you put the GridView and the text...
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Filip SkakunJan 20 '13 at 23:16

couldn't it be part of the header? you have a TextBlock much like that in there now ("Les Caribous"). What element is it semantically bound to? the group itself of individual items in the listview?
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Jim O'NeilJan 21 '13 at 4:44

I want to bound the vertical text to the group of items.
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RomainJan 21 '13 at 7:18